The Celestron Wide 48mm T-Adapter is specially designed for the EdgeHD 9.25", 11", and 14" optical tubes, offering a superior astrophotography experience for users with full-frame DSLR or astronomical cameras. This adapter plays a crucial role in minimizing vignetting – the darkening at the edges of an image sensor – by ensuring a more comprehensive and unobstructed illumination of the camera's sensor.

Key Advantages:

1. Enhanced Illumination: The 48mm T-Adapter offers a larger T-Thread opening than the standard 42mm T-Adapter, allowing full, unimpeded light flow to the camera sensor. This is particularly beneficial for larger full-frame imaging sensors, ensuring corner-to-corner illumination.
2. Reduction of Vignetting: By providing a more extensive light path, the 48mm T-Adapter significantly reduces vignetting, which is especially noticeable in images captured with full-frame sensors.
3. Comparison with 42mm T-Adapter: The standard 42mm T-Adapter, while sufficient for APS-C sensors, can truncate the light cone from the EdgeHD optical tubes, leading to vignetting on full-frame sensors. The 48mm T-Adapter overcomes this limitation.

Note:

• Specific to Full-Frame Sensors: The benefits of the 48mm T-Adapter are most apparent with full-frame sensors. For smaller APS-C sensors, the standard 42mm T-Adapter is recommended.
• Separate T-Ring Requirement: The 48mm T-Adapter requires a corresponding 48mm T-Ring, which is sold separately. While Celestron does not offer 48mm T-Rings, they recommend models from Sky-Watcher USA, available for Canon, Nikon, and Sony cameras.

This T-Adapter is an ideal choice for astrophotographers seeking to maximize the potential of their full-frame sensors, ensuring brighter and more evenly illuminated images free from the constraints of vignetting.

Specifications